diff --git a/gradle.properties b/gradle.properties
index fea8e082fc..4db1b4bebc 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,7 +5,7 @@ kotlin.js.generate.externals=true
 kotlin.incremental=true
 kotlin.incremental.js=true
 
-kotlin_version=1.5.20
+kotlin_version=1.5.21
 kotlin_coroutines_version=1.5.1
 kotlin_serialisation_runtime_version=1.2.2
 klock_version=2.2.0